P CODES (POWERTRAIN) P0400 - P0499

My Car's Cel Is On Always. On Checking I Got Error Code P0430. I Checked On Internet And Found The Problem Is Something Related With...

I Have A 1997 Ford Explorer With Trouble Codes P0430, P0171 & P00174. I Have Cleaned The Maf. Not Sure Where To Go From Here. Kevin. When I...

I Have My Own Scanner And The First Code That I Get Is P0441 Which Is The Evap. Emiss. Syst. Vent Control, The Other Code Is P0446 Which Is...

I Have A P0420 Odbii Error Code P0420 Means "catalyst System Efficiency Below Threshold (bank 1)" I Have Done The Following. 1...

Can Fuel Trims Affect The Efficiency Of The Catalyst. Long Term Is Around +13 Short Term Is Around +6. I Had A P0420 And Went Away.

I Am Trying To Find Thepurge Control Solenoid But Cant Find It, V3 Vortech Supercharged And Methanol Injection Installed

2003 Chevy Impala 6 Cyl Automatic 90,000 Miles I Would Appreciate Any Help Or Advice. The Check Engine Light Just Came On In My Impala...

Engine Mechanical Problem 1998 Honda Accord 6 Cyl Automatic 150000 Miles I Have Replaced The Egr Valve, And Had It Cleaned By 2...

Computer Problem 2002 Mitsubishi Diamante 6 Cyl Front Wheel Drive Automatic 190k Miles Have 171 &174 Codes. Reasonabally Certain No...

My Check Engine Light Came On On My 2003 Impala About 3-4 Months Ago. We Had It Scanned And Code P0401 Came Up. We Changed The Egr Valve...